I have a friend who have issue with cellphone. His use makes him less efficient in his work. How can he manage the usage of his cellphone.

To help your friend manage his cellphone use and increase efficiency at work, here are several strategies and tips shared by Dr. Andrew Huberman:

1. Internet and Phone Shutdown: Dr. Huberman suggests completely shutting off the internet and phone to avoid distractions. This technique helps to enter a state he calls "the tunnel," where one can intensely focus on work without disruption from digital notifications 1.

2. Physical Phone Removal: To resist the temptation of checking the phone, he advises putting the phone in a different location where it is not easily accessible. He shares an extreme method used during his days in the lab, where he would hand his phone to someone and would not retrieve it until a set time, even setting a financial disincentive against retrieving it 2.

3. Scheduled Internet Use: Dr. Huberman and Cal Newport discussed the impact of unrestricted internet and phone usage, suggesting that limiting the availability of these devices during work hours can significantly improve productivity 3.

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     Focus Techniques

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     2

     Productivity Hacks

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     3

     Digital Balance Shift

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     4

     Deliberate Defocus

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4. Deliberate Defocus: Implementing deliberate breaks after intensive work periods is essential. Dr. Huberman recommends engaging in menial tasks that don't require much mental engagement, thus allowing the brain to recharge for subsequent work sessions 4.

These practices, grounded in behavioral modification and understanding of neurophysiology, can enhance your friend's ability to focus and effectively manage time at work.